How to disable `homepage` in dev mode?

Describe the bug

I just created an app with CRA. The deployment base url is in a subfolder (https://a.com/webapp) but I want it to be / in dev mode. Now it will start at http://localhost:3000/handoff in dev mode, so how can I disable it and make it in http://localhost:3000?

Did you try recovering your dependencies?

yes. I just created an new project to reproduce it.

Which terms did you search for in User Guide?

homepage dev

Environment

current version of create-react-app: 4.0.3
  running from /Users/80323181/.config/yarn/global/node_modules/create-react-app

  System:
    OS: macOS 10.15.7
    CPU: (16) x64 Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz
  Binaries:
    Node: 14.15.2 - /usr/local/bin/node
    Yarn: 1.22.5 - ~/.yarn/bin/yarn
    npm: 7.5.2 - /usr/local/bin/npm
  Browsers:
    Chrome: 89.0.4389.90
    Edge: 88.0.705.74
    Firefox: Not Found
    Safari: 14.0.3
  npmPackages:
    react: ^17.0.1 => 17.0.1
    react-dom: ^17.0.1 => 17.0.1
    react-scripts: 4.0.3 => 4.0.3
  npmGlobalPackages:
    create-react-app: Not Found

Steps to reproduce

1. yarn create react-app my-app
2. add below to package.json

"homepage": "http://abc.com/handoff",

1. yarn start
2. It will be served at /handoff

Expected behavior

Should be served at /

[leadream]

@cmacdonnacha add .env file and write PUBLIC_URL in it

PUBLIC_URL=./

[leadream]

@petetnt Thanks. For now I’m doing as this way.